[英]Get IP address with URL string? (Java)
在我的程序中,用户输入一个url字符串,比方说
http://www.engineering.uiowa.edu/~hawkeng//fall01/graphics/potato.gif
我如何获得此网址的IP地址? 我试过用
InetAddress address = InetAddress.getByName(urlStr);
但结果总是返回null。 获取IP地址的正确方法是什么?
试试这个:
InetAddress address = InetAddress.getByName(new URL(urlString).getHost());
获取原始IP:
String ip = address.getHostAddress();
您需要为getByName()方法指定hostname
并返回
给定主机名称的主机IP地址。
URL url = new URL("http://www.engineering.uiowa.edu/~hawkeng//fall01/graphics/potato.gif");
System.out.println(url.getHost());
InetAddress address = InetAddress.getByName(url.getHost());
System.out.println(address.toString());
输出= www.engineering.uiowa.edu/128.255.17.182
获取IP address
String temp = address.toString();
String IP = temp.substring(temp.indexOf("/")+1,temp.length());
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